From af628757847719290d9a6ce5c7f2aae7c11dee10 Mon Sep 17 00:00:00 2001
From: Qu Wenruo <wqu@suse.com>
Date: Sun, 18 Jul 2021 20:54:49 +0800
Subject: [PATCH] btrfs-progs: tests: check nlinks for directories

Make sure btrfs check can detect such problem.  Right now we have no way
to fix it yet.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 .../049-dir-hard-link/default.img.xz          | Bin 0 -> 1712 bytes
 tests/fsck-tests/049-dir-hard-link/test.sh    |  19 ++++++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100644 tests/fsck-tests/049-dir-hard-link/default.img.xz
 create mode 100755 tests/fsck-tests/049-dir-hard-link/test.sh

diff --git a/tests/fsck-tests/049-dir-hard-link/default.img.xz b/tests/fsck-tests/049-dir-hard-link/default.img.xz
new file mode 100644
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GIT binary patch
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diff --git a/tests/fsck-tests/049-dir-hard-link/test.sh b/tests/fsck-tests/049-dir-hard-link/test.sh
new file mode 100755
index 00000000..755cdcac
--- /dev/null
+++ b/tests/fsck-tests/049-dir-hard-link/test.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+#
+# Verify that check can detect overlapped dir with 2 links
+#
+# There is a report that btrfs-check doesn't report dir with 2 links as
+# error, and only get caught by tree-checker.
+#
+# Make sure btrfs check can at least detect such error.
+
+source "$TEST_TOP/common"
+
+check_prereq btrfs
+
+check_image() {
+	run_mustfail "dir with 2 links not detected" \
+		"$TOP/btrfs" check "$1"
+}
+
+check_all_images